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Kopolimery olefin z alkenylosilseskwioksanami
2016
Artykuł stanowi przegląd literatury dotyczącej syntezy i charakterystyki materiałów hybrydowych uzyskanych na drodze kopolimeryzacji alkenylopodstawionych silseskwioksanów z olefinami. Przedstawiono przykłady wykorzystania m.in. procesów kopolimeryzacji koordynacyjnej do syntezy kopolimerów olefin i silseskwioksanów (POSS). Jednocześnie wskazano korzyści płynące z obecności POSS w strukturze polimeru, które przekładają się na jego zwiększoną odporność termiczną oraz parametry mechaniczne.
CCDC 977454: Experimental Crystal Structure Determination
2016
Related Article: Christoph Deckert, Denis Bittner, Luca M. Carrella, Dieter Schollmeyer and Eva Rentschler|2016|Eur.J.Inorg.Chem.||1738|doi:10.1002/ejic.201501400
CCDC 1874714: Experimental Crystal Structure Determination
2019
Related Article: Biswanath Das, Afnan Al-Hunaiti, Brenda N. S��nchez-Egu��a, Erica Zeglio, Serhiy Demeshko, Sebastian Dechert, Steffen Braunger, Matti Haukka, Timo Repo, Ivan Castillo, Ebbe Nordlander|2019|Frontiers in Chemistry|7|97|doi:10.3389/fchem.2019.00097
CCDC 1825951: Experimental Crystal Structure Determination
2018
Related Article: Jacques Pliquett, Souheila Amor, Miguel Ponce-Vargas, Myriam Laly, Cindy Racoeur, Yoann Rousselin, Franck Denat, Ali Bettaïeb, Paul Fleurat-Lessard, Catherine Paul, Christine Goze, Ewen Bodio|2018|Dalton Trans.|47|11203|doi:10.1039/C8DT02364F
Montanacin-L and montanacin-K two previously non-described acetogenins from Annona montana twigs and leaves
2020
A phytochemical study on Annona montana twigs and leaves led to the isolation of eleven annonaceous acetogenins, including two previously non-described compounds, montanacin-L and montanacin-K. Their structures were elucidated by extensive analyses of spectroscopic data (IR, UV, HRTOFMS, EI-MS and 1H, 13C and 2D NMR). The ACGs montanacin-L, montanacin-K, montanacin-D and montanacin-E were evaluated for their toxicity against Spodoptera frugiperda Smith (Lepidoptera: Noctuidae). Results revealed that montanacin-D and montanacin-K exhibited insecticide action. Fil: Ruiz Hidalgo, José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; …
Herbicidal value of essential oils from oregano-like flavour species
2017
ABSTRACTChemical composition and phytotoxicity of oregano, marjoram and Thymus mastichina essential oils against Portulaca oleracea L., Lolium multiflorum Lam. and Echinochloa crus-galli (L.) Beauv. has been investigated. Seventy-seven compounds reaching 97.3% and 99.4% were identified by gas chromatography–mass spectrometry. Carvacrol (60.42 ± 0.07%), p-cymene (15.52 ± 0.02%) and γ-terpinene (5.19 ± 0.02%) were the main compounds in oregano essential oil, whereas large amounts of 1,8-cineol (59.59 ± 0.85%, 49.49 ± 0.37%), linalool (13.05 ± 0.04%, 5.66 ± 0.01%) and α-terpineol (3.36 ± 0.10%, 5.59 ± 0.01%), followed by β-pinene (4.35 ± 0.39, 5.54 ± 0.01%) and α-pinene (4.11 ± 0.53, 4.28 ± 0.…
A new polyketide from the bark of Hypericum roeperianum Schimp. (Hypericaceae)
2019
The isolation and spectroscopic data of a hitherto undescribed polyketide (1) from Hypericum roeperianum Schimp. (Hypericaceae) together with six known compounds (2–7) is herein reported. The struc...
Land Use Affects Carbon Sources to the Pelagic Food Web in a Small Boreal Lake
2016
Small humic forest lakes often have high contributions of methane-derived carbon in their food webs but little is known about the temporal stability of this carbon pathway and how it responds to environmental changes on longer time scales. We reconstructed past variations in the contribution of methanogenic carbon in the pelagic food web of a small boreal lake in Finland by analyzing the stable carbon isotopic composition (δ13C values) of chitinous fossils of planktivorous invertebrates in sediments from the lake. The δ13C values of zooplankton remains show several marked shifts (approx. 10 ‰), consistent with changes in the proportional contribution of carbon from methane-oxidizing bacteri…
Chronospeciation of uranium released in soil during a long-term DU shell weathering experiment.
2021
Corrosion process was investigated of depleted uranium (DU) ammunition fragments buried for three years in aerobic soils continuously irrigated with water. The continuing corrosion process was triggered through formation of soluble uranyl oxyhydrate phases such as metaschoepite and becquerelite, which were identified by micro-Raman and X-ray diffraction spectroscopy. The soil was not amended by phosphates and, therefore, no uranyl phosphates were found as corrosion products on the DU surfaces by X-ray photoelectron spectroscopy. A speciation modelling at high temporal sequence (chronospeciation approach) indicated that the abundant Fe oxyhydroxides in the soil immobilized the U(IV) released…
Integrated biomonitoring of airborne pollutants over space and time using tree rings, bark, leaves and epiphytic lichens
2016
The integrated use of tree rings and outer tissues, and lichens, was tested for monitoring how pollutant concentrations vary in space and over time nearby an incinerator in industrial area in Central Italy. Trace elements in thalli of lichen Xanthoria parietina and in leaves, bark, wood of Quercus pubescens, as well as carbon, oxygen and nitrogen isotope ratios in tree rings were analyzed. Some trace elements in the leaves differed significantly between the plots, though this was not the case in lichens and bark. The values of δ13C and δ18O showed the same trend in all plots, while the values of δ15N were higher in the distal plot. The results indicated that trace elements were intercepted …